In 2009, the Kootenai Tribe of Idaho released and implemented the Kootenai River Habitat Restoration Master Plan. This plan aimed to restore, enhance, and maintain the Kootenai River habitat and landscape to support and sustain habitat conditions for aquatic species and animal populations. In support of these restoration efforts, the U.S. Geological Survey, in cooperation with the Kootenai Tribe of Idaho, conducted high-resolution multibeam echosounder bathymetric surveys, velocity surveys, and collected images of substrate in the Lower Meander Reach (RM 143 - 145.5) and Straight Reach (RM 151 - 152). This data release contains bathymetry, velocity, and substrate data from surveys performed on the Kootenai River between 2012 and 2022 as part of the Substrate Enhancement Pilot Project mapping (SEPP) under the Kootenai River Habitat Restoration Master Plan. First release: April 2018 Revised: January 2023 (ver. 3.0) Version History 3.0